Add Windows to NoSharedLibsPlatformList

We're punting on full -dynamic and -dynamic-too support for Windows
right now, since it's still unstable. Also, ensure "Support dynamic-too"
in `ghc --info` is set to "NO" for Cabal.

See issues #7134, #8228, and #5987

Signed-off-by: Austin Seipp <austin@well-typed.com>
More .gitignore updates

Signed-off-by: Austin Seipp <austin@well-typed.com>